Habib Umar is known worldwide for his dawah towards unity and peace. With his knowledge he has various students from different countries coming to sit at his feet to learn the traditional sciences of Islam. Seyyidi Habib Umar is also a descendent of the messenger of God (salAllahu alahyi wasalam) through the grandson Hussain. The shaykh has also travelled to United Kingdom, United States and Canada to call others to Islam.